Y'know, I'll have a hot take: I grew out of writing traumatic backstories for my characters - not because of any pretentious "non-traumatic backstories are superior mmmyes look at my gigantic brain" but because I realised I could write different backstories. For example, my sona (continued below):
Be honest. Did you traumatize your original character for the sake of character development? Was it for better or for worse? #OCASK #OCQOTD #OCSKY